You can do recording with high FPS (frame rate) if your video source allowing to do it. For webcam you can set FPS from 5-30 values using the menu command - File/Frame rate. But those settings are recommended for webcam. Usually it doesn't work for cheap webcams. The webcam is itself selects FPS depending on its mode.

You can control FPS if you set the option "Show start info". After it click on the video window of Splitcam. The program shows you the current FPS from your video source.